• Buchner Funnels, Sintered Disc (G3), Cone and Vacuum Stem

Buchner Funnels, Sintered Disc (G3), Cone and Vacuum Stem

CNW-1903-1000-24/29

  • Borosilicate

Vendor: SmartLabs

Suited For:

Country of Origin:

Low stock! Only 10 left
R 1,850.00
R 1,850.00
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A glass sintered (fritted) disc Buchner Filter Funnel equipped with a standard ground joint stem with Vacuum . These funnels are designed for vacuum filtration where a secure, airtight connection to a filtering flask is required.

Key Features

  • Body & Disc: Made from high-quality Borosilicate 3.3 glass, known for its excellent chemical resistance and thermal stability.
  • Joint Type: Features a Standard Ground Mouth (conical joint) on the stem for direct fitment into laboratory flasks.
  • Design: Heavy-walled construction to safely withstand the pressure differential during vacuum-assisted filtration. 
  • Vacuum Hose Barb: A hose barb (tubulation socket) is integrated into the stem, allowing the connection of flexible vacuum tubing.
  • Recommended Tubing I.D.: 6 mm - 8mm
  • Barb Outer Diameter (O.D.): 8mm - 10mm
  • Tapered Design: The barb is slightly conical; the measurement at the tip is usually 1–2 mm smaller than the measurement at the base to allow the tubing to slide on easily and then seal tightly.
  • Tubing Selection: Always choose tubing with an Internal Diameter (I.D.) that is 1–2 mm smaller than the barb's widest point.
  • Pressure Rating: For vacuum applications (like using a Buchner funnel), use heavy-wall vacuum tubing (typically rubber or silicone) to prevent the tube from collapsing under suction.
Porosity Grade  Pore Size (
m)		 Common Application
G1 80 – 120 Coarse filtration; rapid flow
G2 40 – 80 Preparative filtration; crystalline precipitates
G3 15 – 40 Analytical work; fine precipitates (most common)
G4 5 – 15 Very fine precipitates; clarifying liquids
G5 1 – 2 Bacterial filtration; ultra-fine particles

 

Capacity (ml)  Standard Joint Size Approx. Disc Diameter (mm)
30 14/23 or 19/26 30
50 19/26 or 24/29 40
100 24/29 or 29/32 50
250 24/29 or 29/32 60
500 24/29 or 29/32 90–95
1000 24/29 or 29/32 110–120
 
Usage Limitations
To prevent damage to the sintered glass disc, avoid using these funnels with:
  • Hydrofluoric acid (HF).
  • Hot concentrated phosphoric acid.
  • Hot concentrated alkaline solutions (alkali bases).

 

Delivery

We deliver nationwide across South Africa. Once your order is on its way, you'll receive a tracking link by email so you can follow its progress. If you need your order urgently or you're delivering somewhere hard to reach, contact our team before you check out and we'll help where we can.

Our Promise

At SmartLabs, we only stock equipment we'd trust in our own labs and classrooms. If a product arrives faulty or doesn't match its description, let us know and we'll make it right, whether that's a replacement or a refund. Our goal is for every order to work exactly as it should, the first time.